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An overspeed quenching oil composition with excellent cooling rate stability and its preparation method

A technology for stabilizing performance and composition, applied in quenching agents, manufacturing tools, heat treatment equipment, etc., can solve problems such as poor metallographic structure, uneven hardness, maximum cooling rate decline, etc., and achieve good metallographic structure and mechanical properties , Excellent cooling speed and stability, easy to recycle and reuse

Active Publication Date: 2016-07-06
JIANGSU XINLU NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The deficiencies of the existing overspeed quenching oil: first, the cooling rate drops rapidly
Most of the performance is that the maximum cooling rate decreases, the maximum cooling temperature decreases, and the time of the vapor film stage is prolonged, which will cause problems such as poor metallographic structure of the workpiece, insufficient hardness, uneven hardness, and soft spots.
The cooling performance of the existing overspeed oil is unstable and the cooling rate drops rapidly. The main reason is that the components of the overspeed oil composition are prone to decay, cracking and other changes under the joint influence of the high temperature thermal shock of the workpiece and the catalytic effect of the metal.
The reasons can be divided into three aspects: 1. The stability of the high-temperature additive is insufficient, the cracking temperature is low, and the cracking decays quickly during the quenching application process; 2. The problem of composition coordination causes the cracking decay of the high-temperature refrigerant; 3. , The consumption of the selected self-consumable foaming low-temperature refrigerant causes the decline of the maximum cooling rate
The second is the selection of raw materials for some overspeed quenching oil compositions, which causes difficulties in the oil-water separation of overspeed quenching oil, and it is difficult to recycle waste oil after cleaning and recycling
[0007] In order to meet the requirements of the high quenching mechanical performance and high quenching mechanical stability of the workpiece for the application of overspeed quenching oil with excellent cooling rate stability, and aiming at the current situation and reasons for the lack of cooling rate stability of the existing overspeed quenching oil, the present invention provides a cooling Superspeed quenching oil composition with excellent speed stability and preparation method thereof

Method used

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  • An overspeed quenching oil composition with excellent cooling rate stability and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0038] Add 40 parts of refined mineral oil to the first reactor, stir evenly and raise the temperature to 80-100°C; add 10 parts of propane petroleum pitch resin with a molecular weight of 2000, and 3 parts of hindered phenol, and stir until it is uniformly dissolved; filter to the second reaction Add 40 parts of refined mineral oil mixed with 90% paraffin-based mineral oil and 10% refined intermediate-based mineral oil, and cool down to 60°C, add 1 part of methyl dicarbamate, alkyl thiocarbamate 1 part of oxazole, 5 parts of metal salt of octadecanesulfonic acid and stir evenly.

Embodiment 2

[0040] Add 40 parts of refined mineral oil to the first reactor, stir evenly and raise the temperature to 80-100°C; add 1 part of propane petroleum asphalt resin with a molecular weight of 8000, and 5 parts of hindered phenol, stir until dissolved evenly; filter to the second reaction Add 45 parts of refined mineral oil mixed with 50% paraffin-based mineral oil and 50% refined intermediate-based mineral oil, and cool down to 60°C, add 3 parts of methyl dicarbamate, alkyl thiocarbamate 1 part of azole, 5 parts of alkyl sulfonate and stir evenly.

Embodiment 3

[0042] Add 40 parts of refined mineral oil to the first reactor, stir evenly and raise the temperature to 80-100°C; add 2 parts of C5 petroleum resin with a molecular weight of 10,000, 0.1 part of hindered phenol, stir until dissolved evenly; filter to the second reactor , add 50 parts of refined mineral oil mixed with 10% paraffinic mineral oil and 90% refined intermediate mineral oil, and cool down to 60°C, add 0.01 part of methyl monocarbamate, alkyl thiadiazole 5 parts, 1.5 parts of octacosyl benzene sulfonate and 1.5 parts of octacosyl sulfonate were stirred evenly.

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Abstract

The invention discloses an ultra-fast quenching oil composition with excellent cooling rate stability, comprising the following components by weight: 80-98% of refined mineral oil, 1-10% of petroleum resin, 0.1-5% of shielding bisphenol, amine Methyl thiocarbamate 0.01-3%, alkyl thiadiazole 0.001-5%, alkyl sulfonate 0.1-5%. The quenching oil composition of the invention has the characteristics of extremely fast cooling rate, especially the cooling performance and cooling rate distribution characteristics are stable. The phase structure and mechanical properties are good, the fluctuation of the mechanical strength performance of the quenched workpiece is small, the qualified rate of the quenched workpiece is high, and the maintenance of the quenching process is simple; the composition has little tendency to generate sludge and carbon deposits, has a long service life, and the workpiece is clean and bright after quenching; the composition The oil-water separation performance is good, and the post-cleaning and recycling of waste oil is convenient for recycling.

Description

technical field [0001] The invention relates to a quenching oil for metal heat treatment, in particular to an overspeed quenching oil composition with excellent cooling rate stability, which is suitable for quenching and strengthening requirements of various high-strength workpieces, and the invention also relates to an overspeed quenching oil with excellent speed stability Method of preparation of the composition. Background technique [0002] Through quenching and corresponding heat treatment process, changing the metallographic structure inside the metal can improve the mechanical strength performance of the metal material by about an order of magnitude; it can obtain the excellent comprehensive performance of hard appearance and tough core, which can make the mechanical parts resistant The impact performance, anti-adhesive wear and anti-fatigue wear have been greatly improved; the service life of key mechanical components has been improved by hundreds or even thousands o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/58
Inventor 方建廖鹰
Owner JIANGSU XINLU NEW MATERIALS CO LTD